在铁路膨胀土路堤边坡的防护措施中，（）措施是不适用的。
A.植物
B.骨架植物
C.浆砌片石
D.支撑渗沟加拱形骨架植物
参考答案：C
His ________behavior made everyone nervous. He was always rushing to open doors and perform other small tasks, apologizing unnecessarily for any inconvenience that he might have caused.
A．oblivious
B．observant
C．obsequious
D．obsolescent
There is no point ________ time ________ with him.
A．to spend; to argue
B．in spending; arguing
C．to spend; arguing
D．in spending; to argue
